---
title: AUVoiceIOSpeechActivityEvent
framework: audiotoolbox
role: symbol
role_heading: Enumeration
path: audiotoolbox/auvoiceiospeechactivityevent
---

# AUVoiceIOSpeechActivityEvent

Constants that indicate the state of muted speech.

## Declaration

```swift
enum AUVoiceIOSpeechActivityEvent
```

## Topics

### Determining when muted speech starts and stops

- [AUVoiceIOSpeechActivityEvent.hasStarted](audiotoolbox/auvoiceiospeechactivityevent/hasstarted.md)
- [AUVoiceIOSpeechActivityEvent.hasEnded](audiotoolbox/auvoiceiospeechactivityevent/hasended.md)

### Initializers

- [init(rawValue:)](audiotoolbox/auvoiceiospeechactivityevent/init(rawvalue:).md)

## Relationships

### Conforms To

- [BitwiseCopyable](swift/bitwisecopyable.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [RawRepresentable](swift/rawrepresentable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Observing muted speech

- [kAUVoiceIOProperty_MutedSpeechActivityEventListener](audiotoolbox/kauvoiceioproperty_mutedspeechactivityeventlistener.md)
- [AUVoiceIOMutedSpeechActivityEventListener](audiotoolbox/auvoiceiomutedspeechactivityeventlistener.md)